Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
INDICATOR CROSSWIND FOR CAR
Fast drive is always fraught with additional danger. Often, even experienced drivers do not take into account all factors that can play a fatal role and lead to traffic accident. Such...
“KIDS” — THE GREEN LIGHT!
In recent years the streets and roads of our country are increasingly the miniature machine, in appearance something of a cross between a kid's scooter, a moped and a scooter. Their...
